Zach Braff Dr. John "J.D." Dorian Actor Sarah Chalke Dr. Elliott Reid Actor Donald Faison Dr. Chris Turk Actor John C. McGinley Dr. Perry Cox Actor Judy Reyes Nurse Carla Espinosa Actor Ken Jenkins Dr. Bob Kelso Actor Neil Flynn The Janitor Actor Heather Graham Dr. Molly Clock Guest Star Common Himself Guest Star Robert Maschio Todd Guest Star Michael Hobert Lonnie Guest Star Marshall Manesh Dr. Akbar Guest Star Wendy Schenker Mrs. MacCalla Guest Star Jason-Shane Scott Mike Guest Star Bill Lawrence Executive Producer John Inwood Director Angela Nissel Writer